diff --git a/docs/INSTALL.md b/docs/INSTALL.md
index 47e578f55..c3bbcb13e 100644
--- a/docs/INSTALL.md
+++ b/docs/INSTALL.md
@@ -451,18 +451,19 @@ This is a probably incomplete list of known CPU architectures and operating
 systems that curl has been compiled for. If you know a system curl compiles
 and runs on, that isn't listed, please let us know!
 
-## 81 Operating Systems
+## 85 Operating Systems
 
 AIX, AmigaOS, Android, Aros, BeOS, Blackberry 10, Blackberry Tablet OS, Cell
 OS, ChromeOS, Cisco IOS, Cygwin, Dragonfly BSD, eCOS, FreeBSD, FreeDOS,
-FreeRTOS, Fuchsia, Garmin OS, Genode, Haiku, HardenedBSD, HP-UX, Hurd,
+FreeRTOS, Fuchsia, Garmin OS, Genode, Haiku, HardedenedBSD, HP-UX, Hurd,
 Illumos, Integrity, iOS, ipadOS, IRIX, LineageOS, Linux, Lua RTOS, Mac OS 9,
 macOS, Mbed, Micrium, MINIX, MorphOS, MPE/iX, MS-DOS, NCR MP-RAS, NetBSD,
-Netware, Nintendo Switch, NonStop OS, NuttX, OpenBSD, OpenStep, OS/2, OS/400,
-OS21, Plan 9, PlayStation Portable, QNX, Qubes OS, ReactOS, Redox, RISC OS,
-Sailfish OS, SCO Unix, Serenity, SINIX-Z, Solaris, SunOS, Syllable OS,
-Symbian, Tizen, TPF, Tru64, tvOS, ucLinux, Ultrix, UNICOS, UnixWare, VMS,
-vxWorks, WebOS, Wii system software, Windows, Windows CE, Xbox System, z/OS
+Netware, Nintendo Switch, NonStop OS, NuttX, OpenBSD, OpenStep, Orbis OS,
+OS/2, OS/400, OS21, Plan 9, PlayStation Portable, QNX, Qubes OS, ReactOS,
+Redox, RICS OS, Sailfish OS, SCO Unix, Serenity, SINIX-Z, Solaris, SunOS,
+Syllable OS, Symbian, Tizen, TPF, Tru64, tvOS, ucLinux, Ultrix, UNICOS,
+UnixWare, VMS, vxWorks, WebOS, Wii system software, Windows, Windows CE, Xbox
+System, z/OS, z/TPF, z/VM, z/VSE
 
 ## 22 CPU Architectures